linux-kernel - Re: [PATCH 0/4] MIPS: Introduce isa-rev.h to define MIPS_ISA

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Date:   Fri, 9 Mar 2018 11:25:37 +0000
From:   James Hogan <jhogan@...nel.org>
To:     Matt Redfearn <matt.redfearn@...s.com>
Cc:     Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
        Paul Burton <paul.burton@...s.com>,
        linux-kernel@...r.kernel.org, "Maciej W. Rozycki" <macro@...s.com>,
        David Daney <david.daney@...ium.com>
Subject: Re: [PATCH 0/4] MIPS: Introduce isa-rev.h to define MIPS_ISA_REV

On Mon, Feb 26, 2018 at 05:02:41PM +0000, Matt Redfearn wrote:
> There are multiple instances in the kernel where we need to include or
> exclude particular instructions based on the ISA revision of the target
> processor. For MIPS32 / MIPS64, the compiler exports a __mips_isa_rev
> define. However, when targeting MIPS I - V, this define is absent. This
> leads to each use of __mips_isa_rev having to check that it is defined
> first. To simplify this, this series introduces the isa-rev.h header
> which always exports MIPS_ISA_REV (the name is changed so as to avoid
> confusion with the compiler builtin and to avoid accidentally using the
> builtin). All uses of __mips_isa_rev are then replaced with the new
> define, removing the check that it is defined.
> 
> Applies on v4.16-rc1
> 
> 
> Matt Redfearn (4):
>   MIPS: Introduce isa-rev.h to define MIPS_ISA_REV
>   MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REV
>   MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REV
>   MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV

Applied for 4.17,

Thanks
James

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